647216

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{2129}}^1$

素因数の和:2156

約数の個数: 20

約数和(自身を含む): 1320600

約数和(自身を除く): 673384

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 2129, 4258, 8516, 17032, 34064, 40451, 80902, 161804, 323608, 647216]

約数ペア:

[(1, 647216), (2, 323608), (4, 161804), (8, 80902), (16, 40451), (19, 34064), (38, 17032), (76, 8516), (152, 4258), (304, 2129)]